UPDATE: Police announced Tuesday that they had arrested Rahmael Sal Holt.
Authorities are seeking a suspect in the fatal shooting of a rookie police officer.
Pennsylvania state police have issued an arrest warrant for 29-year-old Rahmael Sal Holt. He's accused of killing New Kensington Officer Brian Shaw during a traffic stop Friday night.
Authorities say the 25-year-old Shaw was shot in the chest while chasing Holt on foot. He was taken to a hospital, where he was pronounced dead.
Holt faces charges of murder and murder of a police officer.
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Investigators say they know why the traffic stop occurred. But they won't provide further details, citing the ongoing investigation.
Shaw had served as a part-time officer in three other towns before joining the New Kensington force full time in June.
Holt is considered armed and dangerous. If you have any information on his whereabouts, please call 911.
New Kensington is about 18 miles (29 kilometers) northeast of Pittsburgh.